A222305 Numbers k such that 9k is in A045980.

0, 1, 3, 6, 7, 8, 13, 14, 21, 24, 27, 31, 38, 39, 43, 48, 52, 56, 57, 64, 73, 78, 81, 84, 91, 95, 104, 105, 111, 112, 125, 133, 134, 147, 148, 155, 157, 162, 168, 183, 186, 189, 192, 195, 206, 211, 216, 237, 241, 244, 245, 248, 258, 259, 273, 291, 294, 301, 304, 305, 307, 312, 343, 344, 351, 372, 375, 378, 381, 384

Offset: 1

Author

N. J. A. Sloane, Feb 15 2013, based on a suggestion from Allan C. Wechsler

Keywords

• nonn

Comments

The sequence "numbers k such that 3k is in A045980" consists of these numbers multiplied by 3.

Links

• Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A045980, A222304, A222306.

Programs

PARI

T=thueinit('z^3+1);is(n)=n==0 || #thue(T, 9*n)>0 \\ Charles R Greathouse IV, Nov 29 2014